Abstract

Two-dimensional REMPI data, obtained by recording ion mass spectra for HI as a function of two-photon wavenumber were recorded and analyzed. Several previously observed spectra due to resonance transitions to Ω=0 states were (re)assigned. The spectral data revealed several previously unobserved (2+n) REMPI spectra. These were assigned and analyzed to derive band origins and rotational parameters of Rydberg and ion-pair states. Perturbation effects, showing as line-shifts and/or signal intensity alterations, were found to be helpful in spectra assignments.

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